把41750300000改写成用“亿”作单位的数是 亿;7.153如果保留两位小数是 ,如果保留一位小数是 .
=12÷ == :24= %
6÷ ==37.5%=12: =.
=12÷ =0.25=4: = %
1÷4==4: = %= (小数)
==6﹣ = ÷= 折.